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Finding the Fourth Proportional to 76,439.60, 114,659.40 and 39,114.80

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Solution

The fourth proportional to 76,439.60, 114,659.40 and 39,114.80 is: 58,672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,439.60 : 114,659.40 = 39,114.80 : x
  2. Step 2: Convert to fraction form
    76,439.60/114,659.40 = 39,114.80/x
  3. Step 3: Cross multiply
    76,439.60x = 114,659.40 × 39,114.80
  4. Step 4: Simplify right side
    76,439.60x = 4,484,879,499.12
  5. Step 5: Solve for x
    x = 4,484,879,499.12/76,439.60
  6. Step 6: Final answer
    x = 58,672.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.